Best overlap: 1:00 PM to 6:00 PM in Kolkata is 8:30 AM to 1:30 PM in Geneva.
Keep meetings inside 1:00 PM to 6:00 PM in Kolkata — that maps to 8:30 AM to 1:30 PM in Geneva. Geneva is 4.5 hours behind Kolkata, which gives you a solid 5-hour window. Book earlier in it and neither side is rushing. Keep an eye on the calendar — Geneva observes daylight saving and Kolkata doesn't, which nudges this window by an hour twice a year.
| Local time | 12am | 1am | 2am | 3am | 4am | 5am | 6am | 7am | 8am | 9am | 10am | 11am | 12pm | 1pm | 2pm | 3pm | 4pm | 5pm | 6pm | 7pm | 8pm | 9pm | 10pm | 11pm |
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Kolkata Asia/Kolkata | ||||||||||||||||||||||||
Geneva Europe/Zurich |
A complete guide to time zones in 2025, from UTC and GMT differences to Daylight Saving Time changes, IANA database rules, abbreviation pitfalls, and developer best practices for handling global time. -